Example code for my non-destructive-map-merge Sass function.

non-destructive-map-merge-5.scss

$global-colors: (
	neutral: #ccc,
	success: green,
	error: red
);

$local-colors: (
	primary: (
		base: #33c,
		dark: #00a
	),
	neutral: (
		base: #ccc,
		dark: #999
	)
);

$colors: some-different-map-merge($global-colors, $local-colors);

/* Expected $colors list after merging: */

$colors: (
	primary: (
		base: #33c,
		dark: #00a
	),
	neutral: (
		base: #ccc,
		dark: #999
	),
	success: green,
	error: red
);